Abstract: Apparatuses, methods, and systems are disclosed for measuring RTT. One apparatus includes a processor and a transceiver that communicates with a mobile core network via an interworking function. The processor transmits a first request to establish a data connection between the apparatus and the mobile core network, wherein the first request includes a first indicator that the apparatus supports round trip time (“RTT”) measurements, the RTT measurements calculated using messages transmitted via the data connection and using an encapsulation header. The processor receives a first message from the interworking function and transmits a second message to the interworking function, wherein the first message includes a first encapsulation header comprising an echo request indication wherein the second message includes a second encapsulation header including an echo response indication.

Abstract: Apparatuses, methods, and systems are disclosed for access network selection for UEs not supporting NAS over non-3GPP access. One apparatus includes a processor and a transceiver for communicating with one or more non-3GPP access networks. The processor creates a first list of available PLMNs, each PLMN connectable via a non-3GPP access network without using a NAS protocol. The processor selects a first PLMN from the first list and selects a first network slice supported by the first PLMN. Here, the first network slice is identified by a first S-NSSAI. The processor creates a second list of available non-3GPP access networks and selects a first non-3GPP access network from the second list. The processor begins a connectivity procedure over the first non-3GPP access network. Here, the connectivity procedure creates a data connection for the apparatus via the first network slice in the first PLMN, and the connectivity procedure does not use the NAS protocol.

Abstract: Apparatuses, methods, and systems are disclosed for establishing a connection with a dual registered device. One method includes receiving a first request to establish an internet protocol multimedia subsystem session with a first device, wherein the first device is dual registered to: a first network access supporting 5G core network connectivity; and a second network access supporting evolved packet core network connectivity and circuit switched network connectivity, wherein the first device has connectivity to an internet protocol multimedia subsystem via either the first network access or the second network access. The method includes determining first information corresponding to a network access connectivity selected from the first network access and the second network access through which the first device has internet protocol connectivity with the internet protocol multimedia subsystem. The method includes transmitting a second request to a first network function to retrieve second information.

Abstract: Apparatuses, methods, and systems are disclosed for indicating a packet data unit session as unavailable. One apparatus includes a processor that determines that at least one packet data unit session is unavailable. The apparatus includes a transmitter that transmits information indicating that the at least one packet data unit session is to be released.

Abstract: Apparatuses, methods, and systems are disclosed for NSSAI configuration. One method includes determining a configured network slice selection assistance information for a public land mobile network for a remote unit in response to a trigger from an access and mobility management function. The access and mobility management function, a network slice selection function, or a combination thereof determines the configured network slice selection assistance information. The method includes providing the configured network slice selection assistance information to the remote unit via the access and mobility management function.

Abstract: Method and apparatus for application server change are disclosed.

Abstract: Apparatuses, methods, and systems are disclosed for establishing a connection with a dual registered device. One method includes receiving a first request to establish an internet protocol multimedia subsystem session with a first device, wherein the first device is dual registered to: a first network access supporting 5G core network connectivity; and a second network access supporting evolved packet core network connectivity and circuit switched network connectivity, wherein the first device has connectivity to an internet protocol multimedia subsystem via either the first network access or the second network access. The method includes determining first information corresponding to a network access connectivity selected from the first network access and the second network access through which the first device has internet protocol connectivity with the internet protocol multimedia subsystem. The method includes transmitting a second request to a first network function to retrieve second information.

Abstract: Apparatuses, methods, and systems are disclosed for indicating a packet data unit session as unavailable. One apparatus includes a processor that determines that at least one packet data unit session is unavailable. The apparatus includes a transmitter that transmits information indicating that the at least one packet data unit session is to be released.

Abstract: Apparatuses, methods, and systems are disclosed for determining a RAT for an untrusted access network. One apparatus includes a processor and a transceiver that communicates with a first access network. The processor obtains ANI about the first access network, the AM including an access technology type for the first access network. The processor determines to register with a mobile communication network (e.g., a 5GC) via the first access network using an untrusted registration procedure and sends a first request (e.g., an IKE_AUTH Request) to establish a secure connection with a N3IWF in the mobile communication network. Here, the first request includes a registration request for the mobile communication network and the obtained ANI, wherein the obtained ANI is used by the mobile communication network to determine a RAT for the first access network.

Abstract: Apparatuses, methods, and systems are disclosed for selecting a non-3GPP access network. One apparatus includes a processor and a transceiver for communicating with one or more non-3GPP access networks. The processor creates a first list of available PLMNs connectable via non-3GPP access networks. Here, the first list indicates one or more trusted connectivity types supported for each PLMN. The processor selects a first PLMN and a first connectivity type supported by the first PLMN. The processor creates a second list of available non-3GPP access networks. The processor selects a highest priority available non-3GPP network that supports the first connectivity type to the first PLMN. The processor begins a connectivity procedure with the first PLMN using the first connectivity type over the selected non-3GPP access network.

Abstract: Methods, apparatuses and systems for user-plane congestion management are provided. Among these method, apparatuses and systems is a method, implementable by a base station (and/or a serving gateway), for mitigating user plane congestion. The method may include sending a congestion indication to a core network; receiving a general packet radio system (GPRS) tunneling protocol (GTP) packet including an first internet protocol (IP) packet associated with a first flow within a bearer; obtaining, from a header of the GTP packet, an indicator indicative of a priority of the IP packet, wherein the indicator was inserted into the header of the GTP packet by the core network responsive to the congestion indication; and dropping any of the GTP packet and the first IP packet on condition that a priority of a second IP packet associated with second flow within the bearer takes precedence over the priority of the first IP packet.

Abstract: Apparatuses, methods, and systems are disclosed for establishing a connection with a dual registered device. One method includes receiving a first request to establish an internet protocol multimedia subsystem session with a first device, wherein the first device is dual registered to: a first network access supporting 5G core network connectivity; and a second network access supporting evolved packet core network connectivity and circuit switched network connectivity, wherein the first device has connectivity to an internet protocol multimedia subsystem via either the first network access or the second network access. The method includes determining first information corresponding to a network access connectivity selected from the first network access and the second network access through which the first device has internet protocol connectivity with the internet protocol multimedia subsystem. The method includes transmitting a second request to a first network function to retrieve second information.

Abstract: For data collection, apparatuses, methods, and systems are disclosed. One apparatus 800 includes a transceiver 825 that receives 905 a first request from a network analytics function to monitor and report occurrences of a first event. The apparatus 800 includes a processor 805 that identifies 910 a first type of network function in a mobile communication network that reports occurrence of the first event. The processor 805 sends 915 a second request to at least one network function of the first type to monitor and report occurrences of the first event and relays 920 reports of occurrence of the first event from the at least one network function to the network analytics function.

Abstract: For monitoring a slice attribute, apparatuses, methods, and systems are disclosed. One apparatus (1000) includes a processor (1005) that determines (1105) to collect data for a slice attribute of a network slice. Here, the slice attribute is a number of UEs using the network slice and/or a number of data sessions using the network slice. The processor (1005) requests (1110) a first collecting network function to report first usage data (e.g., roaming UE usage) for the network slice according to the slice attribute and requests (1115) a second collecting network function to report second usage data (e.g., non-roaming usage) for the network slice according to the slice attribute. The processor (1005) determines (1120) whether a quota associated with the slice attribute is reached. The apparatus (1000) includes a transceiver (1025) that sends (1125) a notification to a network function in response to the quota being met.

Abstract: The present application relates to a method and apparatus for selecting user plane function. One embodiment of the subject disclosure provides a method for selecting User Plane Function (UPF), comprising: getting, by a Session Management Function (SMF), application information in a Protocol Data Unit (PDU) session during a PDU Session Establishment procedure or during Domain Name System (DNS) Query processing; and selecting, by the SMF, the UPF based on the application information.

Abstract: Apparatuses, methods, and systems are disclosed for determining mobile network policy freshness. One method includes accessing a first policy associated with a first mobile network, a first policy identifier, and a freshness parameter. The method includes determining, based on the freshness parameter, whether the first policy is fresh. The method includes transmitting a registration message to a second mobile network. The registration message includes the first policy identifier in response to determining that the first policy is not fresh.

Abstract: Apparatuses, methods, and systems are disclosed for supporting edge data network discovery. One apparatus includes a transceiver and a processor that receives a first request from a function in the mobile communication network including a UE identity and a UE network address. The processor determines whether the UE is located in a first service area based on a UE location and forwards a DNS request received from the UE network address to a first DNS server associated with the first service area in response to determining that the UE is located in the first service area. Via the transceiver, the processor receives a DNS reply from the first DNS server and sends a second request to a policy function in the mobile communication network in response to determining that the DNS reply includes a first IP address.

Abstract: Apparatuses, methods, and systems are disclosed for transferring a data connection to a radio access network. One method includes receiving, at a remote unit, an indication to handover from a first radio access network to a second radio access network. The method includes determining, after receiving the indication, that at least one data connection of the remote unit is unable to be transferred to the second radio access network. The method includes determining that the at least one data connection of the remote unit is able to be transferred to a third radio access network within a first time duration. The method includes transmitting, within the first time duration, a data connection request to reestablish the at least one data connection over the third radio access network.

Abstract: Apparatuses, methods, and systems are disclosed for registering with a mobile communication network (“MCN”) through another MCN. One apparatus includes a processor and a transceiver, wherein the apparatus is registered with a first MCN. The processor determines to register with a second MCN via the first MCN and sends a request to establish a data connection with the first MCN. The processor receives a command from the first MCN that initiates an authentication procedure with the first MCN and a registration procedure for registering the apparatus with the MCN. The processor exchanges a plurality of authentication messages with the first MCN, each of the authentication messages containing a signaling message for registering the apparatus with the second MCN, and completes the registration with the second MCN via the data connection in response to successfully establishing the data connection.

Abstract: Apparatuses, methods, and systems are disclosed for accessing a mobile communication network using a User Identifier. One apparatus (600) includes a processor (605) that establishes (805) a first connection with a remote unit and a transceiver (625) that receives (810) a first request via the first connection to create a User Profile. The processor (605) determines (815) whether the User Profile is to be linked with a third-party account and, if so, creates (820) the User Profile based on information in the third-party account and, if not, creates (825) the User Profile based on information received from the first device. The transceiver (625) sends (830) to the remote unit via the first connection a Device User Profile and sends (835) a second request to the mobile communication network to store the User Profile.